SU1211005A1 - Thread-cutting chuck - Google Patents

Description

The invention relates to a machine tool industry, in particular to metal cutting, and can be used to attach a thread-cutting tool when machining threads on universal or special machines.

The purpose of the invention is to increase the cutter thread accuracy, which is ensured by the free position of the ve:; by pinching the coupling half in the cartridge case, which allows the tap to be self-aligned to the axis of the treated horn.

. FIG. 1 shows a cartridge, section A-A in FIG. 2 .; in fig. 2, section bb in FIG. one.

The cartridge consists of a housing 1, inside which the leading coupling half 2 is mounted with a gap, which is a holder with spring-loaded balls 3.. The coupling half 2 with its chamfer located at the end is raised by springs 4 to the conical centering of housing 1,

. Ensuring in free state the coaxiality of the tool and the spindle. The inside of the coupling half 2 is fitted with a replaceable exhaust of the coupling half 2, which is the holder of the tap 6. On the outer surface of the driven coupling half 5, longitudinal grooves 7 are made, which provide coupling of the coupling half and torque transmission, and one

 transverse groove 8 for holding one part of the coupling to the other. The number of grooves 7 and, therefore, the magnitude of the torque are determined by

the size of the tap is 6 .. So I,

Bb

five

0

five

0

five

when installing the tap b. the replaceable coupling half 5 automatically adjusts the cartridge to the specified torque. A rigid disk 10 is connected to the leading coupling half 2 by means of screws 9, which, in the case of automating the thread cutting process, affects position sensors attached to the cartridge.

The device works as follows.

Vraa1enie. from the spindle is transmitted to the housing 1, which by means of screws 9 transfers the torque to the half couplings 2 and 5 and the tap 6. The coaxiality of the tap 6 relative to the spindle is provided by creating a preliminary force contact between the conical surfaces of the housing 1 and the leading coupling half 2 by the action of springs 4.

After inserting the tap into the hole, the spindle, together with the housing 1, returns to its original position. At the same time, the springs 4 and the coupling half 2 with the coupling half 5 and the hook cover 6 are allowed to float within the gap between the driving coupling half 2 and the housing 1. When the torque grows on the tap 6 above the specified value, the balls 3 of the coupling, squeeze the springs are recessed in their seats and the half couplings 2 and 5 are disengaged. After the tap leaves the hole, both coupling halves are returned to their original position by the action of springs 4.

vniipi

Circulation 1000

Order 584/17 Subscription

1

Branch ShSh Patent, G.Uzhgorod, Proektna St., 4

Claims (1)

THREADED CARTRIDGE, in the case of which there is a safety coupling in the form of two half-couplings with spring-loaded balls, the driven half-coupling of which is a cylindrical tap holder with longitudinal profile grooves designed to interact with the balls, characterized in that, in order to increase the accuracy of the thread being cut , the leading coupling half is made in the form of a spring-loaded sleeve with a tapered end surface and is installed in the housing with the possibility of axial and radial movement, while in the housing A counter-centering conical surface designed to interact with the conical surface of the sleeve is made. HELL Figure 1 „. SU .., 1211005 1 2 1 100 ')